Wrench.



WILLIAM BOIIN, OF ALLEGHENY, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Aug. 27, 1907.

Application filed 111116 24, 1907. Serial NO- 380,457.

To all whom it may concern:

Be it known that I, WILLIAM Bonn, a citizen of the United States of America, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in \Vrenches, of which the following is a specification, reierence being had therein to the accompanying drawing.

This invention relates to improvements in wrenches, and the invention has for its object to provide a simple and effective wrench that can be easily and quickly adjusted.

Another object of this invention is to provide a strong and durable wrench, wherein. the use of screw threads entirely dispensed with for adjusting the movable jaw of a wrench.

With the above and other objects in view, which will more readily appear as the invention is better understood, the same consists in the novel construction, combination and arrangement of parts to be presently described and then specifically pointed out in the appended claims.

Referring to the drawing, Figure 1 is an elevation of a wrench, illustrating the movable jaw thereof in section, and Fig. 2 is a perspective view of: the locking member of the wrench.

In the accompanying drawings 1 designates the shank of the wrench, which is substantially rectangular in cross section and has one of its edges provided with teeth 2, said teeth gradually decreasing in size toward the upper end of the shank, whereby a more minute adjustment can be obtained for small objects to be gripped. The shank 1 carries a fixed jaw 3 and a detachable handle 4-, said jaw and handle being of the conventional form. Slidably mounted upon the shank .l is a movable jaw 5 provided with vertical openings 6, through which the shank passes and with straps 7 embracing the shank. The jaw 5 is cut away, as at 8, to accommodate the locking member 9, said member being pivotally mounted in the cut away portion of the jaw, as at 10. The locking member is provided with teeth 11 to engage the teeth 2 of the shank 1, and with a recess 12 confronting a recess 14 formed in the jaw 5. In forming the recess 12 a central pin 15 is provided for protruding into coiled spring 16 mounted in the recesses 1.2 and 14, said spring normally holding the teeth 11 of the locking member 9 in engagement with the teeth of the shank 1.. The edge of the shank 1 opposite the teeth 2 is provided with a longitudinally disposed groove 18, in which is arranged a rod 19. Surrounding the rod 19 is a coiled spring 20 engaging the jaw 3, and a pierced lug 21 carried by the lowermost strap 7 of the jaw 5. The coiled spring 20 is adapted to normally hold the jaw 5 in an open position and assists in adjusting the jaw. By pressing inwardly upon the curved outer surface 17 of the locking member 9, the teeth 11 can be moved out of engagement with the teeth of the shank 1, and the jaw 5 can be easily adjusted.

Such variations in the size, proportion and minor details of construction, as are permissible by the appended claims, can be resorted to without departing from the scope of the invention.

Having fully described my invention, what I claim and desire to secure by Letters Patent is:

1. A Wrench embodying a toothed shank having a longitudinally disposed groove formed therein, a jaw fixed upon one end of said shank, a handle carried by the opposite end of said shank, a jaw slidably mounted upon said shank and embracing said shank, a locking member pivotally mounted in said jaw, having teeth to engage said toothed shank, said locking member having a recess formed therein, said jaw l'iaving a recess formed therein confronting with the recess of said locking member, a spring mounted in said recesses for normally holding the teeth of said locking member in engagement with said shank, a rod mounted in the groove of said shank, a spring surrounding said rod for normally holding said jaw in an open position.

2. In a Wrench, a wrench shank provided on its front face with teeth and having a longitn(finally-extending groove in the rear face. a rigid jaw on the upper end of said shank, a movable jaw mounted for sliding movement on the shank, a locking member pivoted within said movable jaw and having teeth for engaging with the teeth on the wrench shank, a spring for normally holdingthe teeth of the locking member in engagement with the teeth of the sllzlllk, a rod mounted in the 5 oove in the rear face of said shank, and a coil spring encileling .nid rod bearing at one end against the rigid jaw of the wrench and at its other end against the movable jaw and exerting its ten sion to move the movable jaw away from the rigid jaw when the teeth of the locking member are disengaged from the teeth of the wrench shank.

In testimony whereof I al'lix my signature in the pres ence of two witnesses.

WILLIAM BOIIN.

Witnesses MAX ll. SROLOVITZ, PATRICK McNAMnn. 

